Columbia is under a flash flood warning until at least 8 p.m. as heavy thunderstorms move slowly through the area.

The area will see heavy rains for several hours as the storm moves north and northeast at about 15 mph, according to the National Weather Service. Winds gusting at around 35 mph are accompanying the storm.

Severe weather is threatening most of the East Coast tonight. The AccuWeather Global Weather Center predicts continued showers and thunderstorms throughout the night across much of the East, from Georgia to Pittsburgh, with more severe weather possible Thursday and Friday.

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Mass Casualties at Fort Jackson. This is only a drill.

Fort Jackson, along with local emergency services, held a mass casualty exercise Tuesday. Included were scenarios where a bomb exploded near the gate and an active shooter entered the commissary. The drill focused on mass casualty response operations, emergency operations center procedures and emergency responder procedures to multiple incidents. "We have a very mature information sharing capability with local, state and federal law enforcement and we are always on the watch," Commanding Maj. Gen. Pete Johnson said of the possible threats.